A spontaneous 9/11 memorial that sprung up at a West Village lot a day after the attacks will be incorporated into the exterior of a new MTA ventilation plant going up on the site, renderings obtained by The Post show.

But even with the inclusion of Tiles for America — thousands of ceramic squares hung on a fence on Greenwich Avenue and Seventh Avenue South — some community leaders are still unhappy with the building’s final design, crafted to please locals in the landmarked neighborhood.

“It looks like a brick-faced tomb,” said Andrew Berman, executive director of the Greenwich Village Society for Historic Preservation.